What’s Vulnerable › Vulnerabilities

CVE-2019-18671

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-06 · updated 2026-06-17
• Weakness: CWE-787

Description

Insufficient checks in the USB packet handling of the ShapeShift KeepKey hardware wallet before firmware 6.2.2 allow out-of-bounds writes in the .bss segment via crafted messages. The vulnerability could allow code execution or other forms of impact. It can be triggered by unauthenticated attackers and the interface is reachable via WebUSB.

Affected products

• Keepkey Firmware: before 6.2.2 — fixed in 6.2.2

How to fix

Upgrade to a fixed version: Keepkey Firmware 6.2.2. Check the vendor advisory for mitigations.

References

• https://blog.inhq.net/posts/keepkey-CVE-2019-18671/
• https://github.com/keepkey/keepkey-firmware/commit/b222c66cdd7c3203d917c80ba615082d309d80c3
• https://medium.com/shapeshift-stories/keepkey-release-notes-v-6f7d2ec78065
• https://medium.com/shapeshift-stories/shapeshift-security-update-8ec89bb1b4e3
• https://blog.inhq.net/posts/keepkey-CVE-2019-18671/
• https://github.com/keepkey/keepkey-firmware/commit/b222c66cdd7c3203d917c80ba615082d309d80c3
• https://medium.com/shapeshift-stories/keepkey-release-notes-v-6f7d2ec78065
• https://medium.com/shapeshift-stories/shapeshift-security-update-8ec89bb1b4e3

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